TIOCSPGRP2const
Process group and session id
Usage
#include <asm/termbits.h> /* Definition of TIOC* constants */ #include <sys/ioctl.h>
int ioctl(int fd, TIOCGPGRP, pid_t *argp); int ioctl(int fd, TIOCSPGRP, const pid_t *argp); int ioctl(int fd, TIOCGSID, pid_t *argp);
Library
Standard C library (libc, -lc)
Overview
- TIOCGPGRP
-
When successful, equivalent to *argp = tcgetpgrp(fd).
-
Get the process group ID of the foreground process group on this terminal.
- TIOCSPGRP
-
Equivalent to tcsetpgrp(fd, *argp).
-
Set the foreground process group ID of this terminal.
- TIOCGSID
-
When successful, equivalent to *argp = tcgetsid(fd).
-
Get the session ID of the given terminal. This fails with the error ENOTTY if the terminal is not a master pseudoterminal and not our controlling terminal. Strange.
Return value
On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.
Errors
ENOTTY
|
The terminal is not a master pseudoterminal and not our controlling terminal. |
|---|---|
EPERM
|
Insufficient permission. |
Releases
2 releases since Debian 13 (Trixie); the text changed 1 time.